Archived posting to the Leica Users Group, 2003/07/16

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Subject: RE: [Leica] Scanning slides
From: "Phong" <phong@doan-ltd.com>
Date: Wed, 16 Jul 2003 21:53:48 -0400

> If you are outputting to an Epson, simply resize
> the image to what you want, and DO NOT RESAMPLE (uncheck the box) and let
> the PPI to the printer fall where it may.
> ...
> My suggested method only resamples the data once,
> by the printer driver (which resamples to 720 prior to running the
> dithering algorithm for the desktop Epsons).
> 

Does this apply to other printers too, in particular Canon S900 ?
How do I find out ?  Thanks,

- - Phong

> -----Original Message-----
> From: owner-leica-users@mejac.palo-alto.ca.us
> [mailto:owner-leica-users@mejac.palo-alto.ca.us]On Behalf Of
> darkroom@ix.netcom.com
> Sent: Wednesday, July 16, 2003 9:00 PM
> To: leica-users@mejac.palo-alto.ca.us
> Subject: RE: [Leica] Scanning slides
> 
> 
> Hi Clive,
> 
> > The resolution you need to scan at is whatever it takes to get 
> 150 to 300
> > dpi at the printed size.
> 
> The best you can do is scan at the optical resolution of the scanner. 
> Scanning at anything other than that degrades the image because you are
> asking the scanning software to interpolate or decimate the data.
> 
> What you then do is resize the image in PS, and what you do there depends
> on your desired output.  If you are outputting to an Epson, simply resize
> the image to what you want, and DO NOT RESAMPLE (uncheck the box) and let
> the PPI to the printer fall where it may.
> 
> This avoids resampling the image twice, once by the scanner, and 
> then again
> by the printer driver.  My suggested method only resamples the data once,
> by the printer driver (which resamples to 720 prior to running the
> dithering algorithm for the desktop Epsons).
> 
> Regards,
> 
> Austin
> 
> 
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